Jack.



No. 871,083. PATBNTED NOV. 12, 1907.

- J. I. BROWN.

JACK.

APPLICATION I'ILBD my a, 1901.

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luvenroz anoznu d No. 871,083. PATENTED NOV. 12, 1907- J. I. BROWN.

JACK.

APPLICATION FILED HA! 6.1907.

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awucufoz Wihmaoco (7 /7 (99 g attoznu a PATENTED NOV. 12, 1907.

J. I. BROWN.

JACK.

APPLIOATIOH TILED MAY 6.1907.

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UNITED STATES PATENT OFFICE.

JOHN I. BROWN, OF MARION, IOWA, ASSIGNOR OF ONE-HALF TO JOSEPH RUBEK, OFMARION, IOWA.

JACK.

Specification of Letters Patent.

Patented Nov. 12, 1807.

Application filed May 6. 1907. Serial No. 372.216.

To all whom at may concern:

Be it known that I, JOHN I. BnowN, a citizen of the United States,residing at Marion, in the county of Linn, State of Iowa, have inventedcertain new and useful Improvements in Jacks; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to jacks and more particularly to that classwhich are designed for use in pulling spikes, stakes and the like, andthe primary object of the invention is to provide a device of this classwhich may be readily operated and which will not require as muchexertion in operation, as do ordinary forms of claw bars now in use.

The devicemay be broadly described as comprising a Windlass or windingdrum upon which a cable or chain is to be wound and the spike or stakeengaging element carried at the free end of the cable or chain. Incarrying out my invention I have provided a novel form of pawl andratchet mechanism whereby the drum may be rotated to wind the cable orchain thereon and may be held when so rotated, means being also providedwhereby the operating mechanism for the drum' may be moved to disengagethe pawls from the ratchets and allow the chain or cable to slack.

In the accompanying drawings, Figure 1 is a front elevation of thedevice in use, Fig. 2 is a side elevation thereof, Fig. 3 is a rearelevation, Fig. 4 is a vertical transverse sectional view taken in aplane with the handle, Fig. 5 is a similar view but taken in a plane atright angles to the plane of Fig. 4, Fig. 6 is a view similar to Fig, 2showing the manner of disengaging the pawls from the ratchets upon thewinding drum, Fig. 7 is a detail front elevation of the spike or stakeclamping member the same being shown in full lines in open position andin dotted lines in closed position, and, Fig. 8 is an edge view thereof.

As shown in the drawings the device comprises a pair of side standards10 which are connected as at 11 by means of braces. Journaled at itsends in the upper ends of the standards is a shaft 12 and fixed uponthis shaft for rotation therewith is a winding drum 13 the heads ofwhich are in the form of ratchets 14. These ratchet heads are of courselocked with the drum for rotation therewith and in order that the drummay be rotated through the instrumentality of the said ratchet heads, Ihave provided a hand operated pawl mechan .ism which will now bedescribed. The said pawl mechanism is in the form of a frame includingside portions 15 and a connecting portion 16 which carries a handlesocket 17 for the reception of one end of a handle 18.

The shaft 12 passes loosely through the lower ends of the side members15 of the frame and hence the frame is movable upon the shalt as an axisboth in a forward and rearward direction. Suitable guides 18 are locatedupon the opposing faces of the side members 15 of the frame of theratchet mechanism and received in theserguides for vertical movementtherein are pawls 19, these pawls being connected by means of a-crosspiece 20, the said cross piece being extended from the upper end of onepawl to the corresponding end of the other pawl and directly beneath theconnecting piece 16 of the frame for the pawl mechanism. A spring 21 isseated at its lower end in a recess 22 formed at the middle of theconnecting cross piece 20 formed in the under face of the connectingpiece 16 and this spring serves to hold the pawls in lowered positionand in engagement at all times with the ratchet heads of the windingdrums.

Now from the foregoing description it will be ob: served thatoscillatory movement of the handle and the frame for the pawl mechanismwith which the handle is connected, will result in the rotation of thewinding drum for the reason that during the forward movement of thehandle, the pawls will ride loosely over the ratchet heads but uponrearward movement of the handle, the pawls will positively engage theratchet heads and cause rotation of the frame for a purpose to bepresently explained.

Connected to the frame is one end of a chain or cable 23 and at theother end of this cable there is connected a gripping device which willbe hereinafter specifically described and it will be understood thatwhen the drum is rotated the cable will be wound thereon and will serve,through the instrumcntality of the gripping device to remove the spikeor stake engaged by the gripping device.

New in order to prevent rearward rotation of the drum to unwind thecable I have provided a pair of pawls 24 which are pivotally mountedupon the 0pposing faces of the standards 10 and have their lower endsweighted and their upper ends held by gravity normally in engagementwith the ratchet heads of the drum. The upper ends of these pawls arewider than the ratchet heads however and a portion of the upper end ofeach of the pawls extends between the corresponding ratchet head and theadjacent standard 10. These portions of the pawls are curved rearwardlyas indicated by the numeral 25 and the rear edge of each side member 15of the pawl frame hereinbefore described is of cam formation asindicated by the numeral 26 and when it is desired to allow the cable torun slack or in other words to unwind from the drum, it is onlynecessary to swing the pawl frame rearwardly until the cam edges of theside members thereof engage the portions 25 of the pawls 24, the saidpawls being, by

reason of this engagement, moved out of engagement with the said ratchetheads.

The spike or stake engaging element of the device comprises a pair ofcrossed pivoted members 27 which at corresponding ends are provided withjaws 28 having serrated hardened face plates 29 secured thereon it beingunderstood that the head of the spike or stake is received between theseserrated face plates. The members 27 have their upper ends turnedoutwardly from each other and they are provided with extensions 30, theextensions upon one member being adapted to abut the other member whenthe device is closed. A ring 31 is engaged with the members 27 abovetheir pivot and connected with this ring at opposite points are the endsof an inverted U-shaped yoke 32 to which the free end of the cable isconnected. It will be understood that when the device is engaged with aspike or stake, the jaws are opened by spreading the upper portions ofthe members 2.7 and upward pull upon the yoke will of course serve toclose the jaws by reason of the engagement of the ring with the saidupper portions of the members 27.

What is claimed is A jack of the class described comprising a frame, ashaft journaled in the frame, a winding drum fixed upon the shaft forrotation therewith, a cable connected with the drum and adapted to bewound thereon, a grip device connected with the cable at the free endthereof, ratchet heads fixed at the ends of the drum, a pawl frameloosely connected with the shafts and adapted to be oscillatedthereabout' with the shaft as an axis, said frame comprising sidemembers, a connectingmember, a handle connected with the connectingmember, guides mounted upon the side members, pawls slidably received inthe guides, a cross piece connecting the pawls at their upper ends, aspring interposed between the cross piece and the connecting member ofthe pawl frame and adapted to hold the pawls at all times in engagementwith the ratchet heads, the said side members having corresponding edgesof cam formation, and pawls pivoted in position to rest normally inengagement with the ratchet heads and having cam portions for engagementby the cam edges of the side members of the pawl frame.

In testimony whereof, I aflix my signature, in presence of twowitnesses.

JOHN 1. BROWN.

Witnesses 4 M. W. COURTNEY, R. E. TRIPP.

